Heterobimetallic gold-iridium, silver-iridium, and gold-ruthenium bis(.mu.-hydrido) complexes. X-ray crystal and molecular structures of [AuRu(H)2(dppm)2(PPh3)]PF6 and [Ir(H)2(bpy)(PPh3)2]PF6

Heterometallic AgI–IrIII Hydride Coordination Polymers Bridged by IrIII Metalloligands

“…The average Ir–P and Ir–N distances of 2.301 and 2.143 Å, respectively, are similar to those in the related mononuclear Ir III hydride complexes of 2,2′‐bpy,73,74 2,2′‐bipyrimidine (bpym),71 2,4,6‐tris(2‐pyridyl)‐1,3,5‐triazine (tptz), and 2,3,5,6‐tetra(2‐pyridyl)pyrazine (tppz) 69. The P(1)–Ir(1)–P(2) angle of 166.57(6)° is also within the range of those in the related mononuclear Ir III hydride complexes of 2,2′‐bpy,73,74 bpym,71 tptz, and tppz 69. The pyridine and pyrimidine rings in the coordinated pprd are completely coplanar.…”

“…The average Ir–P and Ir–N distances of 2.308 and 2.145 Å, respectively, are similar to those of the related mononuclear Ir III hydride complexes of 2,2′‐bpy,73,74 bpym,71 tptz, and tppz 69. The P(1)–Ir(1)–P(2) angle of 164.34(5)° is close to that of complex 1 and those of the related mononuclear Ir III hydride complexes of 2,2′‐bpy,73,74 bpym,71 tptz, and tppz 69. The notable feature in complex 5 is that the dihedral angle of 25.59° between two pyrimidine rings in the coordinated biqz is larger than those of complexes 1 (0°), 3 (11.12°), and the related mononuclear Ir III hydride complexes of 2,2′‐bpy73,74 and bpym71 (3.1–4.3°); this angle minimizes the steric repulsion between the two benzene rings of biqz.…”

“…The P(1)–Ir(1)–P(2) angle of 164.34(5)° is close to that of complex 1 and those of the related mononuclear Ir III hydride complexes of 2,2′‐bpy,73,74 bpym,71 tptz, and tppz 69. The notable feature in complex 5 is that the dihedral angle of 25.59° between two pyrimidine rings in the coordinated biqz is larger than those of complexes 1 (0°), 3 (11.12°), and the related mononuclear Ir III hydride complexes of 2,2′‐bpy73,74 and bpym71 (3.1–4.3°); this angle minimizes the steric repulsion between the two benzene rings of biqz. In addition, a weak intermolecular π–π stacking interaction90 exists between the phenyl group containing the C(35) atom in the coordinated PPh 3 and the pyrimidine ring containing the N(3) atom in the coordinated biqz [the centroid ··· centroid distance and interplanar angle between the two rings are 3.564 Å and 10.30°, respectively; nearest N(3) ··· C(35) 3.249 Å].…”

“…The pyridine and pyrimidine rings in the coordinated pprd are completely coplanar. The dihedral angle between heteroaromatic rings is close to those in the related mononuclear Ir III hydride complexes of 2,2′‐bpy73,74 and bpym (3.1–4.3°) 71. Selected bond lengths and angles for complex 1 are listed in Table S1 (in the Supporting Information).…”

Reactivity of ruthenium and niobium trihydrides with gold fragments. Crystal structure of the hexanuclear raft cluster [Au3Nb3(µ-H)6(η-C5H4SiMe3)6]

“…592( 1 1) 168( 13) -9 14( 14) -1 157 (13) -240( 12) 2 062(12) 2 319(12) 2 742 ( 11) Z I C 315 (11) 313 (11) 364 ( 10) 663 (15) 979(17) 2 538(11) 3 198(11) 3 349( 11) 2 826( 13) 2 345(12) 3 041( 12) 1033( 15) 2 325 (17) 1 406 (10) 1 907( I I) 1947( 14) 1 507 (11) 1170 (11) 450( 12) 1878( 14) 72( 13) 4 335 (10) 4 396 (10) 4 116(12) 3 868 (12) 3 996( 11) 5 849(12) 3 974( 12) 5 113 (11) -928 ( 12) led to the formation of neutral bimetallic RuAu and RuAu, complexes or a neutral raft cluster with the niobium trihydride. We are presently studying the reactivity of this type of derivative and also attempting the synthesis of dihydrogen bimetallic derivatives.…”